At first I thought it was because I switched to FireFox from Chrome, maybe the site doesn't like FireFox but even in Chrome it doesn't login. I reset my password, and still doesn't login. Now I have to wait 5min to try again.

I tried to retrieve lost password too. It said that a mail with the new password has been sent to me but I have not received any such email. I have tried to recover password at least 10 times now but still no email.